diff --git a/scripts.d/50-libjxl/50-libjxl.sh b/scripts.d/50-libjxl/50-libjxl.sh
index 6e3ef2d..349bc53 100755
--- a/scripts.d/50-libjxl/50-libjxl.sh
+++ b/scripts.d/50-libjxl/50-libjxl.sh
@@ -36,15 +36,12 @@ ffbuild_dockerbuild() {
     ninja -j$(nproc)
     ninja install
 
-    echo "Cflags.private: -DJXL_STATIC_DEFINE=1" >> "${FFBUILD_PREFIX}"/lib/pkgconfig/libjxl.pc
-    echo "Libs.private: -lstdc++" >> "${FFBUILD_PREFIX}"/lib/pkgconfig/libjxl.pc
-
-    echo "Cflags.private: -DJXL_STATIC_DEFINE=1" >> "${FFBUILD_PREFIX}"/lib/pkgconfig/libjxl_threads.pc
-    echo "Libs.private: -lstdc++" >> "${FFBUILD_PREFIX}"/lib/pkgconfig/libjxl_threads.pc
-
     if [[ $TARGET == win* ]]; then
-        echo "Libs.private: -ladvapi32" >> "${FFBUILD_PREFIX}"/lib/pkgconfig/libjxl.pc
-        echo "Libs.private: -ladvapi32" >> "${FFBUILD_PREFIX}"/lib/pkgconfig/libjxl_threads.pc
+        echo "Libs.private: -lstdc++ -ladvapi32" >> "${FFBUILD_PREFIX}"/lib/pkgconfig/libjxl.pc
+        echo "Libs.private: -lstdc++ -ladvapi32" >> "${FFBUILD_PREFIX}"/lib/pkgconfig/libjxl_threads.pc
+    else
+        echo "Libs.private: -lstdc++" >> "${FFBUILD_PREFIX}"/lib/pkgconfig/libjxl.pc
+        echo "Libs.private: -lstdc++" >> "${FFBUILD_PREFIX}"/lib/pkgconfig/libjxl_threads.pc
     fi
 
     echo "Requires.private: lcms2" >> "${FFBUILD_PREFIX}"/lib/pkgconfig/libjxl_cms.pc